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Geomaterials

Concrete petrography testing - thin slice

Concrete Petrography

Sandberg is UKAS accredited to carry out concrete petrography and SEM analysis in accordance with ASTM C856 and APG-SR2. 

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Cracks in house wall due to mica and pyrite in building blocks

Mica and Pyrite in Concrete Blocks

The recently published Irish Standard, IS 465, sets out a methodology for the investigation of concrete blocks containing mica and pyrite-bearing aggregates. 

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Cracking caused by mundic concrete

Mundic Concrete

Sandberg has extensive experience with construction in South-West England where so-called Mundic concrete has been used in building construction.

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Hitachi SU 3500 scanning electron microscope (SEM)

Scanning Electron Microscopy (SEM) and X-Ray Microanalysis

Sandberg’s Hitachi SU3500 VP SEM is capable of magnifications over x100000. Characterisation of soil microstructure, cement hydrate morphology and many other applications are possible.

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Sulphate attack of concrete - thin slice viewed under a microscope

Sulfate Attack

Sulfate attack in concrete occurs when sulfate solutions react with the calcium aluminate hydrates present in the hardened cement to form the hydrated calcium sulfoaluminate.

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